SAS, previously Scandinavian Airlines System, is the flag carrier of Denmark, Norway, and Sweden representing the largest airline in Scandinavia. Headquartered at Stockholm Arlanda Airport (ARN) in Sigtuna, Sweden, the airline operates 182 aircraft to 90 destinations. The airline’s main hub is Kastrup or Copenhagen Airport, which is the main European and intercontinental hub. Somewhat smaller hubs also exist at Oslo Airport, Gardermoen and Stockholm-Arlanda Airport. SAS is a founding member of the Star Alliance. Moreover, it holds shares of Aerolineas de Baleares (95%) in Spain, Estonian Air and Air Baltic.